没食子酸辅助水热合成ZnSe微球及其表征  

Gallic acid-assisted hydrothermal synthesis of ZnSe microspheres and its characterization

作　　者：侯美蓉 吕梦凡 霍地[1,2] HOU Mei-rong;LÜMeng-fan;HUO Di(Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China;Advanced Ceramics Research Center,School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]东北大学材料科学与工程学院,先进陶瓷材料研究中心,沈阳110819

出　　处：《中国有色金属学报》2022年第11期3375-3387,共13页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51872033)。

摘　　要：本文以绿色、环境友好的没食子酸(GA)为还原剂,一步水热合成制备出纳米颗粒自组装成的Zn Se微米球。同时研究了水热反应中GA添加量、反应温度及时间等参量对产物组成与形貌的影响以及Zn Se微球生长机制。利用XRD、SEM、TEM、XPS、UV-Vis DRS、FTIR等手段表征了样品物相组成、形貌、光谱特征。利用紫外光催化降解罗丹明B(RhB)溶液评价Zn Se微球的光催化性能。结果表明,在GA的还原作用下,Se被有效还原为Se^(2-),并与Zn^(2+)反应形成闪锌矿Zn Se。GA添加量和水热温度是控制产物组成与形貌的关键。ZnSe一次颗粒尺寸随GA添加量的增加而逐渐减小;只有温度达到150℃及以上时,产物才为单相Zn Se。在15 mmol GA、200℃、24 h优化条件下制备的Zn Se微球具有优异的光催化性能,紫外光照2.5 h后,Zn Se微球对Rh B的光催化降解率达98.1%。In this paper,ZnSe microspheres self-assembled by nanoparticles were synthesized by one-step hydrothermal using green,environmentally friendly gallic acid(GA)as reducing agent.Meanwhile,the effects of GA amount,reaction temperature and time on composition and morphology of the products,and growth mechanism of the ZnSe microspheres were also studied.XRD,SEM,TEM,XPS,UV-Vis DRS and FT-IR were used to characterize phase composition,morphology and spectral features of the prepared samples.Photocatalytic property of the ZnSe microspheres was evaluated by photocatalytic degradation of Rhodamine B(RhB)solution under UV irradiation.The results show that,using GA as reductant in hydrothermal synthesis,Se element could be effectively reduced to Se^(2-)and then react with Zn^(2+)to form ZnSe.The amount of GA and hydrothermal reaction temperature play a key role in controlling composition and morphology of the products.With the increase of GA,the primary particle size of ZnSe gradually decreases,and only when the hydrothermal temperature is 150℃or above,the single-phase ZnSe can be obtained.Under the optimized conditions of 15 mmol GA,200℃and 24 h,the obtained ZnSe microspheres show superior photocatalytic performance,e.g.,the photocatalytic degradation efficiency of RhB for ZnSe microspheres achieves 98.1%after UV irradiation for 2.5 h.

关 键 词：没食子酸 ZNSE 微米球 水热法 光催化 

分 类 号：O611.4[理学—无机化学] TQ125.2[理学—化学]